I'm writing this book—twenty-five pages into it—and it's going well. My chapters are awfully short. The reason behind it is that each chapter takes place at a different time. Sometimes it can be the character near the present time and the next chapter is ten years ago. This is clearly marked at the beginning of each chapter though. Is this acceptable do you think? Will having short, four/five page chapters generally annoy readers? It's almost like a diary but with dialogue.